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20121207
20121207
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of the answer is found in an elaborate system of irrigation, canals that helped the city produce a large agricultural surplus. although most remained farmers, irrigation freed some 30,000 to 40,000 people to pursue other jobs like making clay figurines. but it was not clay sculpture that transformed teotihuacan into an economic superpower. it was another material -- obsidian, a natural volcanic glass whose edge was as sharp as a razor. obsidian was the knife of the ancient world. 30 miles north of teotihuacan, archaeologists have discovered the major source of obsidian in a place called pachuca. this is alejandro pastna of the mexican institute of anthropology and history, and his colleague rafael cruz. they have come here to map the locations of ancient mines. let's go. [ glass crunching ] obsidian fragments litter the surface, the refuse of thousands of years of mining activity. the glass that formed here by nature was especially prized by the ancients because of a unique quality. interpreter: this obsidian was only formed in this deposit. most obsidian is black or gray, but the green
and about box and the point i was trying to stress is i think the u.s. writ large, the government and also the civil society organizations and others were standing on the side lines here. they have to do private city along the same line. right now i think the u.s. policy, and again, u.s. government policy that those of you i think in the civil society and others were sitting on the sidelines here where there's a desire among the political forces including the under islamists who want to bring about change in their political movement and were for the large part sitting on the side line here and we need to do more. >> we do need to move on to the q&a portion here. i would like to take a few questions from the audience the if you have a question raise your hand. we have migrants' circulating and we will take ten minutes before we begin to wrap up. >> i'm on the center for democracy and human rights in saudi arabia in washington, d.c. what's missing over on these discussions which i tend to miss them less and less is the fact that islamists haven't been told all along. the other point is there
Search Results 0 to 1 of about 2